Trolley



Feb. 26, 1929.

A. L. HENRY ET AL TROLLEY Filed Feb. 16, 1928 /4 aummtm yAndreu/Liknry' Giles SMoore mean,

Patented Feb. 26, 1929.

UNITED STATES PATENT OFFICE.

ANDREW L. HENRY AND GILES S. MOORE, 0F INDIANAPOLIS, INDIANA, ASSIGNORS TO TROLLEY SHOE-WHEEL COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORA- TION or momma.

TROLLEY.

Application filed February 16, 1928. Serial No. 254,754.

Our present invention relates to contact plates for securing a good electrical connection between a trolley shoe and its supporting' harp, and it is an object of the invention to provide a set of contact plates which will afford a better electrical connection between the harp and shoe than has heretofore been obtained and which will thus permit an uninterrupted flow of electric current, all as will be hereinafter more particularly described and claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts,

Figure 1 1s a side elevation illustratmg the application of our device with portions broken away to more clearly show the construction,

Figure 2, a section on the line 2 2 of Fig. 1, and

Figure 3, a tact plates.

In the drawings reference character 10 indicates a harp having forks 11 which support a pin 12 in their upper ends which pin forms a pivot or hearing for a trolley shoe 13. The harp 10 and shoe 13 may be of ordinary construction but we have shown the shoe of atype illustrated in our application filed February 25, 1927, Serial No. 170,968, now Patent No. 1,698,591, dated January 8,

perspective of the spring con- 1929. Instead of providing independent contact plates mounted one on each side of the shoe by means of rivets or the like and which frictionally engage the forks of the harp as in previous constructions, we provide two pairs of oppositely acting contact plates provided with intermediate body portions 1% and 15 and with end portions bent laterally therefrom on the same sides of the bodies and form outer and inner contact plates 16 and 17. The contact plates 16are divergent with reference to their central body portion and i the contact plates 17 are convergent'relative thereto. The member 14 is placed within the member 15 and fastened thereto by means of rivets 18 as shown. lVith this assembly we have a rectangular body from each side of which extend upwardly at divergent angles two contact plates 16 and 17. The contact plates 16 and 17 are of spring metal and have respectively apertures 19 and 20 of a size corresponding to the pin or bearing 12 for receiving the same when the parts are assembled. WV hen the contact plates are compressed and applied between the harp and shoe the outer contact plates 16 engage the forks of the harp and the inner contact plates 17 press inwardly against the shoe 13 so that as the shoe moves along a. trolley wire W and oscillation between the harp and shoe occurs a good contact will be had and an uninterrupted flow of current between the harp and the wire will be maintained.

While we have shown our invention as applied to a particular formof trolley shoe it may be used with shoes of otherconstruction and it will be obvious to those skilled in the art that various changes may be made in our device without departing from the spirit of the invention, and we, therefore, do not limit ourselves to what is shown in the drawings and described in the specification, but only as set forth in the appended claims.

Having thus fully described our said invent-ion, what we claim as new and desire to secure by Letters Patent, is:

1. Means for providing permanent electric contact between a trolley shoe and harp for permitting the uninterrupted fiow of the electric current comprising a body having-a pair of diverging contact plates adapted to bear resiliently outward against forks of a harp, and a second body fixed to the first body and having a pair of converging spring contact plates adapted to bear inwardl against a trolley shoe, substantially as set orth.

V 2. The combination of a pair of members disposed in fixed spaced relation, a pinconnecting said members, an intermediate memher on said pin between said fixed spaced members, and a pair of connected diverging spring contact plates between the intermediate member and one of the spaced members for maintaining electrical contact between the spaced members and the intermediate member, substantially as set forth. I i 3. The combination of a pair of members disposed in fixed spaced relation, a pin connecting said members, an intermediate memher on said pin between said fixed spaced members, and a pair of connected diverging spring contact plates between each side of the intermediate member and the spaced members for maintaining electrical contact between the spaced members and the intermediate member, substantially as set forth.

4. The combination of a pair of fixed spaced members, a pin connectingsaid members,an intermediate member on said pin between said fixed spaced members, and

means for maintaining electrical connection I between the spaced and intermediate meming a pair of connected spring plates each 15 having portions disposed on opposite sides of the movably supported member, one pair of said portions bearing" outwardly against the stnpporting member, andthe other pair bearing inwardly against themo'vable supported member, substantiaiiy set" forth.

In Witness whereof, We have hereunto set our hands Indianapolis, Indiana, this 13th day out February, A. D. nineteen hundred and twenty-eight. i

ANDREW L! HENRY. GILES s. noonn. 

